ROCKS FROM
MARS: THE SNC METEORITES
33. Impact Origin of Meteorites from Mars

This
painting of a large meteorite impact shows how rocks might be ejected
from Mars into space. In a sufficiently energetic impact, rocks from
the martian surface can be ejected with enough velocity to escape the
planet's gravity. After orbiting the Sun for millions of years, these
rocks may enter Earth's atmosphere, as shown in the inset.